Sewing-machine take-up



(No Model.)

G. W. BAKER. SEWING MACHINE TAKE-UP.

Patented May 21 1889.

WITNESSES C/KJT N PETERS. Mwmm n-r. Wiuhinglon, u. c

UNTTED STATES PATENT OFFICE.

GEORGE V. BAKER, OF CLEVELAND, OlllO.

SEWING-MACHINE TAKE-UP.

SPECIFICATION forming part of Letters Patent No. 403,723, dated May 21,1889.

Application filed September 10, 1888. Serial No. 285,019. (No model.)

To all whom it may concern:

Be it known that I, GEORGE W. BAKER, of Cleveland, in the county ofCnyahoga and State of Ohio, have invented certain new and usefulImprovements in Take-Up Mechanism for Sewing-Machines; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will onable others skilled in the art to which itpertains to make and use the same.

My invention relates to improvements in take-up mechanismforsewing-machines; and it consists in certain features of constructionand in combination of parts, hereinafter described, and pointed out inthe claims.

111 the accompanying drawings, Figure 1 is a reduced side elevation,partly in section. Fig. 2 is a front elevation. Fig. 3is aplan insection on lines 00 u: of Figs. 1 and 2. Fig. 4is an elevation of thetake-up lever. Fig. 5 shows details in elevation, hereinafter described.

A represents a portion of the sewing-ma chine head, and B the shaft thatoperates the needle mechanism. (Not shown.) On the forward end of thisshaft is mounted cam 13 for operating the take-up lever C, a suitableform of this lever being shown more clearly in Fig. l. The head Aisprovided with aslot, A, for accommodating lever O, and the head has alsoa lateral bore, a, for accommodating the fulcrum of the lever. Bore a ispreferably made large enough to accommodate a bushing, a, for receivingthe wear-caused by theoscillation of pivotal pin or fulcrum D inoperating the take-up lever. Pin D is substantially of the form shown inFig. 5, having a threaded section, (Z, for engaging the threaded hole Cof lever O, and having reduced and enlarged sections, respectively, (Zand (1 that serve as journalbearings in the bushing, section (Zpresenting a square end or shoulder against lever C when the parts arescrewed together. Pin D has a section, (Z somewhat less in diameter thansection (P, with slot (1 for receiving the inner end, f, of spring F,this portion of the spring being bent inward, as shown in Fig. 5. Thisspring is coiled around section (Z and the outer end thereof, f, entersa hole, 6, of cap E. (See Fig. 3.) Cap E is seated in a counterbore,either of bushing a. or head A, whichever may be preferred,

and the cap, at the periphery thereof, is provided with a series ofnotches, e, for engaging screw g. By removing the screw the cap may beturned on its axis to adjust the-tension of the spring F, after whichadjustment screw g is returned to its place and screwed tight to holdthe cap from turning, and thereby holding the adjustment of spring F. Afriction-block, c, is pivoted on stud c,the latter being screwed into athreaded lateral hole, 0", of lever O, the block being located inposition to engage the peripheral face of cam B. As lever O is tilted bythe action of the cam on block 0, the latter oscillates on its pivotalbearing and always fits squarely on the face of the cam. The hole inblock 0, through which the stud passes, is preferably located centrallyin the block, and the latter, when worn, may be turned on its axis tobring another face of the block in contact with the cam, and this may bedone by elevating lever C and without removing the stud c. The lead ofthe screw-threads on section d of pin D,that engages lever G, is suchthat the lever, when elevated by the action of the cam, screws againstsect-ion (Z and thereby tightens the lever on the pin, and the tensionof spring F also tends to screw these parts together, by reason of whichno other fastening is required to hold the pin and lever always in firmcontact, so that the lever and its pivotal pin turn together. The pinhaving a long bearing in the bushing, the parts are rendered durable,and the pin or bushing, or both, could be renewed at a trifling cost.

In assembling the parts lever O is placed in position in slot A, afterwhich pin D is inserted and screwed home to its place in the lever. Nextthe spring is placed on the pin, the end f of the spring entering slotd" of the pin. The cap is placed in position with the end f of thespring entering hole 6 of the cap. The cap is then turned in thedirection to give the necessary tension to the spring, after which screw9 is placed in position and engages a notch, e, of the cap, therebyholding the latter from turning. The head of the screw overlaps the capand holds the latter to its pla-ccin its seat.

What I claim is l. The combination, with the take-up lever and cam, ofan ngular friction-block having a series of bearing-faces and apivot-pin passing through the block and secured to the takeup lever, thesaid friction-block adapted to be turned on its pivot to present a newface to the cam, substantially as set forth.

2. The combination, with take-up lever, revolving cam for elevating thelever, and pivotal pin screwed into a lateral threaded hole of thelever, substantially as indicated, of

spring for depressing the lever, said spring being coiled around thesaid axial pin, the arrangement of parts being substantially asdescribed, whereby the action of the spring and cam, respectively, tendto tighten the screw-joint of the lever and pin, substantially as setforth. 7

3. The combination, with take-up lever, re-

tion, in the presence of two witnesses,this 0 21st day of April, 1888.

GEORGE w. BAKER.

\Vitnesses:

CHAS. H. DoRER, ALBERT E. LYNcH.

